package com.lee.demo1.controller;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
  
@Controller  
public class CaptchaImageCreateController {
    
	
    private Producer captchaProducer = null;  
  
    @Autowired  
    public void setCaptchaProducer(Producer captchaProducer) {
        this.captchaProducer = captchaProducer;  
    }  
  
    @RequestMapping("/captchaImage")
    public String handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {  
  
        response.setDateHeader("Expires", 0);  
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");  
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");  
        response.setHeader("Pragma", "no-cache");  
        response.setContentType("image/jpeg");  
        String capText = captchaProducer.createText();  
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);  
        BufferedImage bi = captchaProducer.createImage(capText);  
        ServletOutputStream out = response.getOutputStream();  
        ImageIO.write(bi, "jpg", out);  
        try {
            out.flush();
        } finally {
            out.close();
        }
        return null;
    }  
}  